Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Python Object-Oriented Python Advanced Objects Double

Posted by Frank Campos
Frank Campos
4,175 Points

what am I doing wrong?

Can someone explain to me what I am doing wrong?

doubler.py 
class Double(int):
    def __new__(args,**kwargs):
        self= int.__new__(*args, **kwargs) 

        self.Double = self*2
        return self.Double

1 Answer

Shavaune Shackleford
Shavaune Shackleford
9,161 Points

here you go:

class Double(int):

    def __new__(*args,**kwargs):
        self = int.__new__(*args, **kwargs) 

        return self * 2
Frank Campos
Frank Campos
4,175 Points

Thank you, It was so easy.

Chris Freeman
Chris Freeman
Treehouse Moderator 68,441 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,441 Points

To be correct, the __new__ method should have a cls as the first argument. See docs

class Double(int):
    def __new__(cls, *args,**kwargs):
        self = int.__new__(cls, *args, **kwargs) 
        return self * 2

A bug report has been sent to Kenneth Love.